/*
 * Copyright 2006-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package asphalt2.util
{
	import flash.events.Event;
	import flash.events.IEventDispatcher;

	/**
 	* @author c9katayama
 	*/
	public class EventUtil
	{
		/**
		 * 1回のみ実行するイベントリスナーを追加します。 
		 **/
		public static function addOnceEventListener(dispatcher:IEventDispatcher,eventType:String,listener:Function):void{
			var f:Function = function(e:Event):void{
				dispatcher.removeEventListener(eventType,f);
				listener(e);
			};
			dispatcher.addEventListener(eventType,f);
		}
		/**
		 * 1回のみ実行するイベントリスナーをremoveします。 
		 **/
		public static function removeOnceEventListener(dispatcher:IEventDispatcher,eventType:String,listener:Function):void{
			var f:Function = function(e:Event):void{
				dispatcher.removeEventListener(eventType,f);
				listener(e);
			};
			dispatcher.removeEventListener(eventType,f);
		}
	}
}